Madness is a Japanese yaoi and adventure manga series written and illustrated by Kairi Shimotsuki, who also writes shonen and seinen manga. It is serialized in Comic Manga Lynx, under Gentosha Comics, Inc.. It is set in 3000 AD, where Catholic priest Izaya and his mass-murderer teammate Kyou fight to save the world from a series of natural disasters. The manga is licensed in North America by Tokyopop's imprint Blu.